feat: 优化代码

app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt

@@ -215,6 +215,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
             R.id.menu_enable_replace -> ReadBook.book?.let {
                 it.useReplaceRule = !it.useReplaceRule
                 menu?.findItem(R.id.menu_enable_replace)?.isChecked = it.useReplaceRule
+                onReplaceRuleSave()
             }
             R.id.menu_book_info -> ReadBook.book?.let {
                 startActivity<BookInfoActivity>(Pair("bookUrl", it.bookUrl))

app/src/main/java/io/legado/app/ui/replacerule/ReplaceRuleActivity.kt

@@ -141,8 +141,8 @@ class ReplaceRuleActivity : VMBaseActivity<ReplaceRuleViewModel>(R.layout.activi
     }
 
     private fun observeReplaceRuleData(key: String? = null) {
-        replaceRuleLiveData?.removeObservers(this)
         dataInit = false
+        replaceRuleLiveData?.removeObservers(this)
         replaceRuleLiveData = if (key.isNullOrEmpty()) {
             App.db.replaceRuleDao().liveDataAll()
         } else {
@@ -304,22 +304,27 @@ class ReplaceRuleActivity : VMBaseActivity<ReplaceRuleViewModel>(R.layout.activi
     }
 
     override fun update(vararg rule: ReplaceRule) {
+        setResult(Activity.RESULT_OK)
         viewModel.update(*rule)
     }
 
     override fun delete(rule: ReplaceRule) {
+        setResult(Activity.RESULT_OK)
         viewModel.delete(rule)
     }
 
     override fun edit(rule: ReplaceRule) {
+        setResult(Activity.RESULT_OK)
         ReplaceEditDialog.show(supportFragmentManager, rule.id)
     }
 
     override fun toTop(rule: ReplaceRule) {
+        setResult(Activity.RESULT_OK)
         viewModel.toTop(rule)
     }
 
     override fun upOrder() {
+        setResult(Activity.RESULT_OK)
         viewModel.upOrder()
     }
 }